JP3487065B2 - Transfer lubrication device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer lubricating device, and more particularly to a transfer lubricating device having a simple structure and capable of supplying an optimum amount of lubricating oil to two adjacent tapered bearings.

[0002]

2. Description of the Related Art In a vehicle, there is provided a transmission for converting the driving force of an engine into a desired one in accordance with a driving condition,
A power transmission device including a transfer and the like for distributing the driving force is provided.

In some transfer cases, at least two rotary shafts are arranged in a transfer case, and taper bearings for rotatably supporting these rotary shafts are provided.

Further, the transfer is provided with a lubricating device for lubricating the rotating shaft, the tapered bearing and the like.

In this lubricating device, when supplying the lubricating oil to the rotary shaft or the tapered bearing, the lubricating oil scraped up by the gear provided on one rotary shaft is collected in the oil garter, and the lubricating oil is collected from the oil garter. Lubricating oil is introduced to each taper bearing. In order to guide the lubricating oil from the oil garter to each taper bearing, the transfer case may be provided with a plurality of oil passages for each taper bearing, or a plurality of oil garters may be provided for each taper bearing. Or
The tip side of the oil gutter is branched toward the direction of each taper bearing.

Due to its structure, each taper bearing has a suction action for sucking the lubricating oil by the rotation of the inner ring with which the rotary shaft is fitted.

Further, as such a transfer lubricating device, for example, JP-A-5-155265, JP-A-63-24449, JP-A-60-10885.
It is disclosed in Japanese Patent No. Japanese Patent Laid-Open No. 5-155265 discloses that an oil receiving shelf is provided at a position facing a bevel gear that is arranged on the transfer output shaft so as to be offset from the gear train, and in the vicinity of the input gear. ,
Even when the transfer input shaft is arranged higher than the output shaft and the transfer lubricating oil and the transmission lubricating oil are separated from each other, the input gear portion of the transfer input shaft can be reliably lubricated. 63-2
The one described in Japanese Patent No. 4449 includes a thrust washer having an inner diameter larger than the shaft diameter and a C-shaped cutout part of an annular shape to form a protruding piece on the outer periphery, and the cutout portion of the thrust washer faces upward. The protrusion is supported on the shaft by engaging with a locking groove formed in the case so that a horizontal C-shaped gap is formed between the inner diameter and the outer periphery of the shaft. Actual Kaisho 60-10
In the one disclosed in Japanese Patent No. 8853, a pair of upper and lower shafts provided with a plurality of gears are rotatably supported by a pair of bearings arranged above and below a casing and a cover that covers an opening at one end thereof in a liquid-tight manner. At the same time, the tip of the upper shaft is liquid-tightly projected to the outside of the cover through an annular oil seal fitted in the opening of the through hole of the cover, and the upper bearing and one side of the oil are exposed between the casing and the cover. The upper end of the communication passage in a transmission in which an upper oil storage portion for guiding the lubricating oil housed in the casing and a lower oil storage portion for exposing one side of the lower bearing are provided and the quantity oil storage portions are connected by a communication passage. Is opened in the upper oil reservoir above the lower end of the lip of the oil seal.

[0008]

However, in the conventional transfer lubrication device, when a plurality of oil passages are individually provided in the transfer case so as to correspond to the respective taper bearings, the transfer case has a mold configuration. However, there is a problem in that it takes time and costs to manufacture the transfer case mold.

Further, when a plurality of oil garters are provided or the tip side of the oil garter is branched into a plurality, the structure of the oil garter becomes complicated and the cost is increased.

Further, when the rotational speed of the inner ring of each taper bearing is different, or the diameter of each taper bearing is different, the suction action of the lubricating oil of each taper bearing is different, so that the same degree of lubrication oil is applied to each taper bearing. I cannot supply the amount,
Therefore, there is a disadvantage that the optimum amount of lubricating oil cannot be supplied to each taper bearing.

[0011]

In order to eliminate the above-mentioned inconvenience, therefore, the present invention arranges at least two rotary shafts in a transfer case, and rotatably supports these rotary shafts. In a transfer lubrication device in which a tapered bearing having a suction action of lubricating oil by rotation is provided, and the lubricating oil is supplied to at least two adjacent tapered bearings by an oil garter, the two adjacent tapered bearings are connected to the adjacent tapered bearings from the oil garter. The transfer case is provided with one main oil passage for guiding the lubricating oil, and one branch oil passage branched into the main oil passage so as to communicate with one taper bearing and the other so as to communicate with the other taper bearing. Lubricating the two tapered bearings by providing the transfer case with the other branched oil passage branched into the main oil passage. Characterized in that a passage width of the two branch oil passage is set as different from each according to the magnitude of the suction effect.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION According to the present invention, a main oil passage is provided in the transfer case, and one branch oil passage and the other branch oil passage branched from the main oil passage are provided. Therefore, each tapered bearing is provided in the transfer case. By eliminating the need for multiple independent oil passages for each transfer case, the transfer case mold configuration is simplified, thus saving time and cost for mold production, and the oil garter is designed to guide the lubricating oil only to the main oil passage. Therefore, the oil garter can have a simple structure and can be inexpensive.

Further, the passage width of one branch oil passage on the side of one tapered bearing having a large suction action of lubricating oil is smaller than the passage width of the other branch oil passage on the side of another tapered bearing having a small suction action of lubricating oil. If set to be narrow, the amount of lubricating oil supplied to the one branch oil passage and the other branch oil passage can be adjusted, and the optimal amount of lubricating oil can be supplied to the one tapered bearing and the other tapered bearing.

[0014]

Embodiments of the present invention will be described in detail and specifically with reference to the drawings. 1 to 9 show an embodiment of the present invention. 1 and 2, reference numeral 2 is a transfer of a power transmission device of a vehicle, and 4 is a transfer case. The transfer case 4 includes a left transfer case 6 and a right transfer case 8. Although not shown, the transfer 2 is connected to the engine via a differential gear and a transmission.

The transfer case 4 has a right front wheel shaft 10 having one end connected to a pinion gear portion of a differential gear, an input shaft 12 loosely fitted to the right front wheel shaft 10 and connected to a differential case of the differential gear. An idler shaft 14 parallel to the input shaft 12 and an output shaft 16 parallel to the idler shaft 14 are provided.

The other end of the right front wheel shaft 10 is rotatably supported by the right front wheel bearing 22 held in the right front wheel shaft hole 20 of the right front wheel bearing portion 18 of the right transfer case 8. The right front wheel shaft hole 20 is provided with a right seal body 24, which serves as a seal, from the outside.

The input shaft 12 is the left transfer case 6
Left input bearing 28 held by the left input bearing 26 of
And the right input bearing 32 held by the right input bearing portion 30 of the right transfer case 8 are rotatably supported.

An input gear 34 is fixed to the input shaft 12 at a substantially central portion.

Further, between the input shaft 12 and the right transfer case 8, an intermediate seal body 36 is provided outside the right input bearing 32 to provide a seal.

The idler shaft 14 is disposed adjacent to and parallel to the input shaft 12 and has a left idler taper bearing 40 held by a left idler bearing portion 38 of the left transfer case 6 and a right transfer case. 8 is rotatably supported by a right idler taper bearing 44 held by the right idler bearing portion 42 of FIG.

As shown in FIGS. 2 and 4, the right idler taper bearing 44 is formed with a predetermined first diameter B1 and comprises a right idler inner ring 46, a right idler outer ring 48 and a right idler roller 50. By rotating the idler shaft 14 integrally with the idler shaft 14, a predetermined lubricating oil suction action is provided.

A first idler gear 52 meshing with the input gear 34 and a second idler gear 54 adjacent to the first idler gear 52 are fixedly mounted on the idler shaft 14.

The output shaft 16 is disposed adjacent to and parallel to the idler shaft 14 and is held on a left output bearing portion (not shown) of the left transfer case 6 by a left output taper bearing (Fig. (Not shown) and the right output taper bearing 60 held in the right output shaft hole 58 of the right output bearing portion 56 of the right transfer case 8 are rotatably supported.

This right output taper bearing 60 is shown in FIGS.
As shown in FIG. 4, the right idler taper bearing 44 is formed to have a second diameter B2 which is larger than the first diameter B1 and is composed of a right output inner ring 62, a right output outer ring 64, and a right output roller 66. As shown in FIG. 5, the rotation speed of the right output inner ring 62 is higher than that of the right idler inner ring 46, and therefore, the right output inner ring 62 rotates integrally with the output shaft 16, so that the lubrication of the right idler taper bearing 44 is increased. It has a great oil suction effect.

That is, the right output taper bearing 60 is
The diameter is larger than that of the right idler taper bearing 44, and the rotation speed of the right output inner ring 62 is larger than that of the right idler inner ring 46.
Since it is higher than the rotational speed of, the suction action of the lubricating oil is large.

The right output taper bearing 60 and the right idler taper bearing 44 are arranged adjacent to each other as shown in FIGS.

A driven gear 68 that meshes with the second idler gear 54 is fixed to the output shaft 16, and a bevel gear 70 is spline-connected adjacent to the driven gear 68.

The bevel gear 70 includes a pinion shaft 72.
The pinion 74 is provided in mesh with each other. A clutch mechanism (not shown) that connects and disconnects the driving force to the rear wheels is provided on the tip end side of the pinion shaft 72.

The right transfer case 8 is provided with a closing body 76 for closing the right output shaft hole 58.
It is fixed by a fixing bolt 80 through 8.

In the transfer case 4, an oil garter 82 for collecting the lubricating oil scraped up by the bevel gear 70 rotating with the rotation of the output shaft 16 is provided.
It is arranged along the output shaft 16.

As shown in FIGS. 5 to 8, the oil garter 82 is provided with the right idler taper bearing 4 from the bevel gear 70 side.
4 and the right side output taper bearing 60 side, the trough part 86 which forms the linear oil groove 84, the oil receiving part 88 continuous with this trough part 86, and the mounting hole continuously connected with this oil receiving part 88. 9
And a mounting bracket 92 formed with 0.

As shown in FIGS. 1 and 5, the mounting bracket 92 is mounted on the inner surface of the right transfer case 8 by mounting bolts 94 inserted through the mounting holes 90. As a result, the trough portion 86 of the oil garter 82 is arranged so as to be slightly inclined to the right transfer case 8 side, as shown in FIG.

In order to guide the lubricating oil from the oil groove 84 of the oil garter 82 to the right side idler taper bearing 44 and the right side output taper bearing 60 which are the adjacent two taper bearings, the inner surface of the right side transfer case 8 has a Main oil passage 96 and an idler-side branch oil passage 98 that is one of the branch oil passages branched to the main oil passage 96.
And the output side branch oil passage 100, which is the other branch oil passage.

The idler side branch oil passage 98 and the output side branch oil passage 100 are formed at the same depth H in the right transfer case 8 as shown in FIG. Although not shown, the main oil passage 96 is also formed to have substantially the same depth H.

Here, in view of the fact that the right output taper bearing 60 has a large suction action of the lubricating oil of the right idler taper bearing 44, as shown in FIGS. 1 and 3, the idler side branch oil passage 98 is provided with a predetermined first passage width. On the other hand, the output side branch oil passage 100 is set to the second passage width A2 which is narrower than the first passage width A1 while being formed to A1. That is, the second passage width A2 of the output side branch oil passage 100, which is the one branch oil passage on the side of the right side output taper bearing 60, which is the one tapered bearing having a high inner ring rotation speed and a large diameter, is It is set to be narrower than the first passage width A1 of the idler-side branch oil passage 98, which is the other branch oil passage on the side of the right idler taper bearing 44, which is another taper bearing having a low rotation speed and a small diameter.

Further, as shown in FIG. 1, the main oil passage 96
The idler-side branch oil passage 98 and the output-side branch oil passage 100 branched from the idler-side branch oil passage 9
8 is formed in a curved shape with the first curved surface R1, and
The output side branch oil passage 100 is formed in a curved shape with the second curved surface R2, and is arranged substantially symmetrically with respect to the branch portion 102.

As shown in FIGS. 1 and 5, an oil hold plate 106 is attached to the inner surface of the right transfer case 8 to form a breather chamber 104 in cooperation with the inner surface of the right transfer case 8.

The oil hold plate 106 includes
As shown in FIG. 9, an idler-side curved portion 108, an oil garter-side curved portion 110, first and second mounting holes 112 and 114, and a breather opening 116 are formed.

As shown in FIG. 2, an idler-side oil circulation groove 118 communicating with the breather chamber 108 is formed between the inner surface of the right transfer case 8 and the end surfaces of the idler shaft 14 and the right idler taper bearing 44. Further, in the closing body 60, an output-side oil circulation groove 120 communicating with the breather chamber 108 and a lubricating oil are guided to the output shaft 16 and the end surface of the output-side taper bearing 60 by being connected to the output-side oil circulation groove 120. An output side oil supply groove 122 is formed.

Next, the operation of this embodiment will be described.

As the output shaft 16 rotates, the bevel gear 7
When 0 scrapes up the lubricating oil, the lubricating oil hits the bearing portion 88 of the oil garter 82 and is collected in the oil groove 84 of the trough portion 86.

As shown in FIG. 5, the lubricating oil of the oil garter 82 is supplied to the right transfer case 8 by a trough 86 which is slightly inclined toward the right transfer case 8 side.
To the main oil passage 96. The lubricating oil in the main oil passage 96 is guided to the idler side branch oil passage 98 and the output side branch oil passage 100 side.

At this time, the right idler taper bearing 44 and the right output taper bearing 60 have different inner ring rotational speeds and different diameters, and therefore have different lubricating oil suction actions. That is, the suction action of the lubricating oil of the right idler tapered bearing 44 is smaller than the suction action of the lubricating oil of the right output tapered bearing 60.

Therefore, according to this embodiment, the first passage width A1 of the idler side branch oil passage 98 on the right side idler taper bearing 44 side is the second passage width of the output side branching oil passage 100 on the right side output taper bearing 60 side. Since it is wider than A2, the lubricating oil easily flows into the idler-side branch oil passage 98, while the lubricating oil hardly flows into the output-side branch oil passage 100.

Therefore, the amount of lubricating oil to the right side idler taper bearing 44 side and the amount of lubricating oil to the right side output taper bearing 60 side can be adjusted to substantially the same level, and the right side idler taper bearing 44 and the right side output taper bearing are able to be adjusted. It is possible to supply an optimum amount of lubricating oil to 60 and to effectively lubricate these bearings 44 and 60.

Further, according to the configuration of this embodiment, it is not necessary to provide the right side transfer case 8 with a plurality of independent oil passages corresponding to the bearings 44 and 66, so that the mold configuration of the right side transfer case 8 is simplified. Therefore, it is possible to save time and cost for mold making.

Further, only one oil garter 82 is required, and the tip side of the oil garter 82 is not branched. Therefore, the structure of the oil garter 82 is simplified as a whole, which results in the manufacturing cost. Can be reduced and the price can be reduced.

Furthermore, the idler side branch oil passage 98
Is formed by the first oil level R1 and the output side branch oil passage 1
00 is formed by the second curve R2, and the idler side branch oil passage 98 and the output side branch oil passage 100 are connected to the branch portion 10
Since it is branched substantially symmetrically with respect to 2 and is formed into a curved surface (shown by the hatched portion in FIG. 1), it improves the suction efficiency of the lubricating oil by a pump action similar to that of a water flow pump,
Right idler taper bearing 44 and right output taper bearing 6
0 can be positively supplied with lubricating oil.

Further, the first passage width A1 and the depth H of the idler side branch oil passage 98, and the output side branch oil passage 1
If the second passage width A2 and the depth H of No. 00 are respectively changed to predetermined values, the amount of lubricating oil to the right idler taper bearing 44 and the right output taper bearing 60 can be easily adjusted, and no separate parts are required. It's simple.

[0050]

As is apparent from the above detailed description, according to the present invention, the transfer case is provided with one main oil passage for guiding the lubricating oil from the oil garter to the two adjacent taper bearing sides, and one taper is provided. One branch oil passage branched into the main oil passage so as to communicate with the bearing and the other branch oil passage branched into the main oil passage so as to communicate with the other tapered bearing are provided in the transfer case,
2 depending on the magnitude of the suction action of the lubricating oil of the two taper bearings
By setting the passage widths of the two branched oil passages differently, the transfer case mold configuration is simplified, saving the mold manufacturing time and cost, and simplifying the oil garter configuration, overall, easy It can be configured in various ways.

Further, it is possible to supply the optimum amount of lubricating oil to two adjacent taper bearings and to effectively lubricate these taper bearings.

[Brief description of drawings]

FIG. 1 is a front view of a right transfer case.

FIG. 2 is a partial cross-sectional view of a transfer.

FIG. 3 is a cross-sectional view of each branched oil passage.

FIG. 4 is a diagram showing the relationship between the size of each tapered bearing and the rotation ratio.

FIG. 5 is a cross-sectional view of an attached state of the oil garter.

FIG. 6 is a plan view of an oil garter.

FIG. 7 is a side view of the oil garter.

FIG. 8 is a front view of an oil garter.

FIG. 9 is a front view of an oil hold plate.

[Explanation of symbols]

2 transfer 4 transfer cases 6 Left side transfer case 8 Right transfer case 12 input axes 14 idler axis 16 Output shaft 44 Right side idler taper bearing 60 Right output taper bearing 70 bevel gear 82 Oil gata 96 Main oil passage 98 Oiler side branch oil passage 100 Output side branch oil passage 102 branch

Continuation of the front page (56) Reference JP-A-60-151463 (JP, A) Actual opening Sho-56-160352 (JP, U) Actual opening Sho-63-152060 (JP, U) Actual opening Sho-60-108853 (JP , U) Actual development Sho 58-195148 (JP, U) Actual development Hei 7-38802 (JP, U) Japanese Patent Publication Sho 49-9531 (JP, B1) (58) Fields investigated (Int.Cl. ⁷ , DB) (Name) B60K 17/344 B60K 17/00-17/08 F16H 3/00-3/78 F16H 57/04 F16N 31/00

Claims (3)

(57) [Claims] 1. A transfer case is provided with at least two rotary shafts, and these rotary shafts are rotatably supported and tapered bearings each having a suction action of lubricating oil by rotation of an inner ring are provided. In a transfer lubricating device for supplying lubricating oil to two tapered bearings by an oil garter, one main oil passage for guiding lubricating oil from the oil garter to the two adjacent tapered bearings is provided in the transfer case, and The transfer case is provided with one branch oil passage branched to the main oil passage so as to communicate with the taper bearing and the other branch oil passage branched to the main oil passage so as to communicate with the other taper bearing. , The widths of the two branched oil passages are changed according to the magnitude of the suction action of the lubricating oil of the two tapered bearings. The transfer lubrication device is characterized in that 2. The two branch oil passages have one branch oil passage on the side of one tapered bearing where the rotation speed of the inner ring is high, and the other branch oil on the side of the other tapered bearing where the rotation speed of the inner ring is low. The transfer lubrication device according to claim 1, wherein the lubrication device is set to be narrower than a passage width of the passage. 3. The two branch oil passages have a passage width of one branch oil passage on one taper bearing side having a larger diameter than a passage width of the other branch oil passage on the other taper bearing side having a smaller diameter. The transfer lubricating apparatus according to claim 1, wherein the lubricating apparatus is set to be narrow.